Thank you for your question and I understand your concern.
You did not indicate if the glow bar igniter is glowing red or not. Remove the small square plastic inspection cover below the door and then start the dryer. If you find the glow bar igniter glowing red and then fading off without any burner ignition, replace both solenoid coils mounted on the gas valve.
If the igniter is not glowing then it could have one the following component failures preventing your dryer from heating:
Hi Limit thermostat (key#15)
Thermal cut off (key#16)
Operating thermostat (key#8)
Thermal fuse (key#6)
Flame sensor (key#49)
Solenoid coils (key#13 and 14)
Each one of the components I listed above with key numbers can be disconnected and tested for continuity with an ohm meter. I recommend checking each component I have a key number beside. You will need to disconnect the two wires from the component before testing it for continuity. Whichever component tests open/no continuity, replace that component. Parts can be looked up and ordered from
NOTE:Disconnect the power cord from the power source before removing the front and rear panels
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services